Endoscopic Ultrasound Applications in Premalignant and Malignant Disease

Endoscopic Ultrasound: Applications in Pre-malignant and Malignant Disease December 20 th, 2010 Andrew T. Pellecchia, MD Director of Advanced Endoscopy Jacobi Medical Center

EUS Originally utilized to ‘clear’ the bile duct precholecystectomy in patients with suspected CBD stones Less invasive alternative to ERCP Risks similar to standard EGD EUS still used for this indication Less than 20% of EUS procedures are performed for this indication in established advanced endoscopy center

Evolution of EUS as an imaging study EUS as a means of fluid and tissue acquisition Cancer staging Cyst analysis EUS as an interventional/therapeutic modality Neurolysis Transmural cyst drainage Direct access to biliary system More…

Overview Several illustrative EUS cases from JMC Basic EUS principles What is ‘within reach’ of EUS +/- FNA? Brief overview of selected diseases

Patient GR 62 y. o. woman with significant weight loss over the past 6 months CT a/p shows a 6 cm intra-abdominal mass EGD/EUS/FNA planned to further evaluate lesion

Endosonographic Evaluation EGD showed normal gastric mucosa with evidence of mild external compression vs. submucosal lesion in the area of the gastric incisura EUS Clear demarcation of hypoechoic mass adjacent to left lobe of the liver FNA was performed

GR-GIST H&E

GR-GIST C-KIT (CD 117)

Patient DD 62 y. o. man with history of alcoholism and recurrent pancreatitis since the 1970’s, admitted to an outside hospital with jaundice MRI showed a large pancreatic head mass ERCP for biliary drainage – failed Complicated PTC by pancreatic tail pseudocyst formation with internalization - successful Patient left AMA and came to JMC EUS/FNA performed to obtain diagnosis

Endosonographic Evaluation EUS Large ~30 mm hypoechoic pancreatic head mass surrounding the intrapancreatic CBD with PTC drain seen within CBD Dilated PD to 5 mm with evidence of chronic pancreatitis FNA performed

DD- Pancreas Ca. Pap stain

DD-Pancreas Ca. Pap stain

Patient CE 69 y. o. man with h/o non-small cell lung cancer s/p LUL resection in 2006 who is referred after a chest CT showed new mediastinal lymphadenopathy EUS/FNA scheduled to evaluate for recurrent disease

Endosonographic Evaluation EUS Suspicious lymph nodes in the aortopulmonary window, sized 6 -11 mm Suspicious lymph nodes in the subcarinal space, sized 6 -12 mm FNA performed

CE-Non-small cell ca. Pap stain

CE-Non-small cell ca. Pap stain

Radial Ultrasonography Oblique-viewing instruments with an ultrasound transducer located at the tip The circumferential ultrasound image is perpendicular to the long axis of the endoscope

Linear Ultrasonography Ultrasound image parallel to the long axis of the endoscope Capable of performing real time, ultrasound directed needle aspiration biopsy Color Doppler analysis

Working End of Linear Echoendoscope

What The Scope of the Echoendoscope can be assessed by EUS with potential FNA? Any structure within several cm of U/L GI tract Ability to see structures measuring 1 mm Ability to perform FNA upon structures measuring 3 mm Limitations Cannot visualize beyond air-filled structures Cannot biopsy through air-filled structures, blood vessels, or the heart Lung that is non-adjacent to esophagus, trachea, aorta, pulmonary artery, r/l atria

Risks of EUS FNA Pancreatitis < Significant bleeding < 1: 500 Perforation < 1: 1000 Infection - rare Antibiotics for transrectal FNA or FNA of cysts Inadequate tissue 1: 10 to 1: 5 Can be related to pathology of lesion Cholangio, GIST

Thyroid Mass

FNA of Thyroid Mass

Right Lower Pole Kidney Mass

EUS in Pre-Malignant Disease Pancreatic Cysts PD fluid analysis Pancreatic screening in high risk populations Chronic pancreatitis Family history of pancreatic cancer Cancer syndromes Submucosal Pancreatic lesions rests

Pancreatic Cystic Fluid Analysis Incidental pancreatic cysts seen in up to 20% of abdominal CT’s performed for any reason Cystic lesions of the pancreas, even when found incidentally, may represent malignant or pre-malignant lesions The majority of pancreatic cysts require evaluation by EUS/FNA measurement of CEA, amylase, genetic markers Relatively sensitive and specific for differentiating mucinous cysts (IPMN, MCA) from non-mucinous cysts (SCA, Pseudocyst)

HOP Serous Cystadenoma

BOP Serous Cystadenoma

Oncology Consult? (FNA benign: Island of normal pancreatic tissue within serous cystadenoma)

Patient PS Media reports state that the actor was diagnosed with an IPMN is a pre-cancerous lesion Conclusion: the IPMN had already progressed to adenocarcinoma prior to diagnosis/resection Resected IPMNs often have foci of adenocarcinoma Lesson: ALL pancreatic cysts need to be referred for risk stratification

EUS in Malignant Disease Non-small cell lung cancer Pancreatic cancer Esophageal and gastric cancer Cholangiocarcinoma Rectal adenocarcinoma Metastatic disease Lymph nodes: aortopulmonary, subcarinal, paraesophageal, celiac, intra-abdominal Left lobe of liver Left adrenal And beyond – right lobe of liver, right adrenal, . . .

EUS and Lung Cancer “We really do not need additional proof before EUS-FNA is considered the gold standard for invasive staging of non-small cell lung cancer and for diagnosis of posterior mediastinal lesions; there is little to lose and much to gain. ” -P. Vilmann and S. S. Larsen, Eur Respir J 2005; 25: 400– 401

EUS and Lung Cancer

Lymph Node Stations

Normal AP Window

LAD at AP Window

FNA at AP Window

Subcarinal Space

LAD in Subcarinal Space

Likely Benign Abd LAD

Pancreatic Mass

Pancreatic Mass at CT

Pancreatic Mass at CT

'Pancreatic' Mass at EUS

FNA of Peri-pancreatic Mass § Metastatic Leiomyosarcoma

Liver Mass

FNA of Liver Mass

Hyperechoic Liver Masses

FNA of Hyperechoic Liver Mass

EUS Evaluation of Left Lobe of Liver

Abdominal LAD

EUS/FNA of Periportal LN

Primary Target Fail…

…Secondary Target Acquired (Carcinoma at FNA)

Normal Left Adrenal

Left Adrenal Met in NSCLC

Normal GI Wall Layers

Normal Esophagus and Cyst

Distal Esophageal Lesion

Normal Gastric Wall Layers

Mucosal Lesion

Mucosal Lesion

Malt Lymphoma

Gastric Lipoma

T 2 Gastric Adenocarcinoma Invasion of Muscularis With Intact Serosa

T 3 Gastric Cancer

T 1 Rectal Cancer by EUS

T 2 Rectal Cancer

Rectal Mass at CT: T 4? (Apparent invasion of uterus)

Further History: Recent IUD Removal (Actinomycosis)

Celiac Plexus Neurolysis

Celiac Axis

Key Points All patients with pancreatic cysts should have consultation for possible EUS/FNA is the standard of care in the loco-regional staging of many cancers Lung Esophageal Gastric Pancreatic Cholangiocarcinoma Rectal adenocarcinoma

Key Points, Continued EUS is minimally invasive Reduces need for mediastinoscopy, surgical biopsy, bronchoscopy, CT guided biopsy Reduces morbidity/mortality while reducing health care costs Appropriate Prevents cancer staging unnecessary surgical resections Identifies patients who will benefit from pre-op chemo/xrt

Cutting Edge EUS Applications Role for EUS is expanding EUS placement of fiducials for radiation therapy EUS rendezvous procedure for accessing CBD EUS directed brachytherapy EUS guided hepaticogastrostomy for malignant CBD obstruction